Effect of hydrogen and DME injection in homogeneous charge compression ignition engine with DME second injection strategy

J. Jeon*, C. Bae, Bengt Johansson

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Scopus citations

Abstract

The effect of dimethyl-ether (DME) second injection was investigated in a single-cylinder direct injection compression ignition engine for homogeneous charge compression ignition combustion. Two different fuels, hydrogen and DME were used as main fuels. DME second injection timing and quantity were varied to control the combustion phasing of homogeneous charge compression ignition engine combustion. DME second injection timing was varied from 100 crank angle degrees before top dead centre to 5 after top dead centre. The DME injection quantity was varied from 5mg to 9mg. When DME injection was 9mg, DME was injected by two strategies, which are single injection and split injection. Both single fuel and dual fuel combustion were influenced by DME second injection timing. When DME was used as a main fuel, combustion was stable regardless of the all injection timing while indicated mean effective pressures were lower than the dual-fuelled combustion. The Ignition delay of DME was much shorter than that of hydrogen due to its low auto-ignition temperature and higher cetane number. DME injection timing and quantity controlled the hydrogen ignition delay when hydrogen was used as a main fuel. With 5 mg of DME second injection, some injection timing showed misfire, therefore, increased DME injection quantity was required for stable combustion. 7mg of DME second injection lead the highest indicated mean effective pressure.

Original languageEnglish (US)
Title of host publicationInstitution of Mechanical Engineers - Internal Combustion Engines
Subtitle of host publicationImproving Performance, Fuel Economy and Emissions
PublisherWoodhead Publishing Limited
Pages157-166
Number of pages10
ISBN (Print)9780857092052
StatePublished - Jan 1 2011
EventIMechE's Internal Combustion Engines: Improving Performance, Fuel Economy and Emissions Conference 2011 - London, United Kingdom
Duration: Nov 29 2011Nov 30 2011

Publication series

NameInstitution of Mechanical Engineers - Internal Combustion Engines: Improving Performance, Fuel Economy and Emissions

Other

OtherIMechE's Internal Combustion Engines: Improving Performance, Fuel Economy and Emissions Conference 2011
CountryUnited Kingdom
CityLondon
Period11/29/1111/30/11

ASJC Scopus subject areas

  • Fuel Technology

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